//不要给我WA WA 叫
//一定AC
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <iomanip>
#include <climits>
#define int long long 
#define x first 
#define y second 
using namespace std;
const int N = 1e5 + 10;
int a[N];
void solve()
{
    int n;
    cin >> n;
    int sum = 0;
    for(int i = 1; i <= n; i++)   
    {
        cin >> a[i];
    }    
    sort(a + 1 , a + n + 1);
    for(int i = 1; i <= n - 1; i++) 
    {
        sum += a[i];
    }
    if(abs(sum - a[n]) <= 1)
    cout << sum + a[n] << endl;
    else cout << 2 * sum + (abs(sum - a[n])) + abs(sum - a[n]) - 1 << endl;
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr),cout.tie(nullptr);
    int t = 1;
    while(t -- )  solve();
    return 0;
}
